Cap for incubator-lamps.



PATENTED JUNE 4, 1907.'

J. T. MOLLOY. GAP FOR INGUB ATOR LAMPS.

APPLICATION FILED MAR. 6, 1906.

JAMES T. MOLLOY, OF ALBION, IOWA.

CAP FOR INCUBATOR-LAMPS.

Specification of Letters Patent.

Patented June 4;, 1907.

Application filed March 6 ,1-906. Serial No. 304,588.

Be it known that I, J AMES T. h/IOLLOY, a

citizen of the United States, residing at Al- 4 bion, in the county ofMarshall and State of Iowa, have invented certain new and usefulImprovements in Caps for Incubator-Lamps, of which the following is aspecification. j

This invention relates to an improved cap l for incubator lamps of thattype which are so designed as to automatically regulate the direct draftaccording to the temperature within the incubator.

The object of the invention is to provide a cap of this character whichwill be extremely sensitive to small variations in temperature and whichwill thereby enable a I constant heat to be maintained.

' the balance bar upon the A further object is to so construct-the capthat it can be effectively employed in connection with any of the.various types of lamps in most common use.

For a full description of the invention and the merits thereof and alsoto acquire a knowledge of the details of construction of the means foreffecting the result, reference 12 is to be had to the followingdescription and accompanying drawings, in which:

Figure 1 is a perspective view showing the application of the device;Fig. 2 is a side ole vation showing the doors in' a closed position;Fig. 3 is a similar view showing the doors in an open position; and, 4is a horizontal sectional view on the line 0cac of Fig. 2.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The device comprises essentially a body portion or framework having apair of oppositely swinging doors hinged thereto, and means whereby thedoors can be operated by incubator.

The numeral 1 designates the base of the framework which is shown asapproximately rectangular in shape, the sides of the base being formedwith upwardly extending projections 2 each of which has upwardlyconverging sides. These sides of the base are alsoformed with laterallyextending ears 3 between which the doors 1 are pivoted and for thispurpose strips 5 may be secured to the sides, the ends of the stripsprojecting outwardly to form the ears 3. The doors 4 normally lieagainst the edges of the upper j extensions 2 so as to form a tightclosure to slide upwardly so which shuts off all direct draft from thelamp, and the lower ends of the doors are pivoted between the ears 3. Itwill be observed that the sides of these doors project slightly beyondthe extensions, and that the lower corners of the doors are notched at 6so as to fit between the ears 3. Arms 7 are provided by means of whichthe doors can be swung outwardly to produce a direct draft, and thesearms 7 are shown as formed by bending inwardly one end of each of thepintles 8 upon which the doors are mounted. For this purpose the pintlesand doors are rigidly connected to each other and in the constructionshown in the drawings, it will be observed that the pintles are formedwith an offset portion 9 which is engaged by bending the lower ends ofthe doors upwardly as seen at 10.

In order to provide for the simultaneous operation of the two doors abar 11 is provided which is slidably mounted upon one of the extensions2. The upper end of the bar 11 is formed with an outwardly bent portionwhich engages with the balance bar 13 upon the incubator, while thelower end of the bar 11 is formed with oppositely projecting arms 14having their ends bent outwardly to form projections 15 which engagewith the arms 7 by means of which the doors any upward pull upon theoutwardly bent portion 12 of the bar 11 will cause the same as to openthe doors 4. draft for the lamp. In

and produce a direct Atare opened. It will thus be apparent that thepreferred construction the bar -11 is.

formed out of a single piece of wire or similar material by doubling thesame upon itself, the ends of the wire being bent so as to form theoppositely extending arms 14. This op erating bar 11 may be veryconveniently mounted upon the eyes 16 projecting therefrom.

In order to limit the swinging movement of the doors 4 stops areprovided and in the preferred construction these stops are formed bybending the ends of a rod 17 inwardly as seen at 18.

is mounted and it will be observed that this rod 17 is provided withoffset portions which are located adjacent the point at which it issecured in position and which throw the framework by means of IOO , Thisrod 17 is rigidly secured at an intermediate point to the extension 2opposite to that upon which the operating bar 11 X major portion of therod away from the framework so that it does not in any manner interferewith the free operation of the door 4. The stops 18 are preferably soarranged that the doors will always assume a closed position of theirown accord when not held open by means of the operating bar 11.

In the operation of the device, the cap is placed upon the lamp in theusual manner so thatthe outwardly bent portion 12 of the bar 11 is inengagement with one arm. of the balance bar 13 upon the incubator. Itwill thus be seen that any movement of the 13 caused by the variationsin temperature within the incubator will operate to either open or closethe doors 4 and regulate the di rect draft upon the lamp. It may bementioned that the movements of the balance bar 13 are caused by thevariations in the length of the upright rod 20 which extends within theincubator and expands and contracts according to the changes oftemperature therein. Owing to the fact that the arms 7 are secureddirectly to the hinged portion of the doors 4 and are comparativelyshort a very small movement of these. arms will produce a comparativelylarge-movement of the doors. This feature renders the device extremelysensitive to very small variations in temperature and thus enables theincubator to be kept at a uniform temperature.

Having thus described the invention, what is claimed as new is:

1. A cap for incubator lamps comprising a framework, a door hinged tothe framework so as to control the effective size of the open ingtherethrough, an arm for swinging the door, and an operating barslidably mounted upon one side of the framework and engaging with thebefore mentioned arm to control the movements of the door, said barbeing adapted to be engaged and moved by the balance bar upon theincubator.

2. A cap for incubator lamps comprising a framework, a door hinged tothe framework and controlling the effective size of the openingtherethrough, an operating arm for swinging the door, a stop forlimiting the swinging movement of the door, the said stop beingsupported by an arm projecting from the framework, and an operating barslidably mounted upon one side of the framework and engaging withthedoor-operating arm to control the swinging movement of the door, andprovided with means whereby it is ada ted to be controlled in itsmovement by the balance bar upon the incubator.

3. A cap for incubator lamps comprising a framework, a door hingedthereto and controlling the eflective size of the opening therethrough,an arm for swinging the door, an operating bar slidably mounted upon oneside of the casing and engaging with the be fore mentioned arm tocontrol the swinging movement of' the door, an outwardly proj ectingmember upon the operating bar, and

balance bar therethrough,

gages with the outwardly projecting portion upon the operating bar andcontrols the swinging movement of the door.

4. A cap for incubator lamps comprising a framework, a pair ofoppositely swinging doors hinged to the framework and controlling theeffective size of the opening inwardly extending arms projecting fromthe bearings of the two doors, an operating bar slidably mounted uponone side of the framework, oppositely projecting arms upon the operatingbar which engage with thebefore mentioned arms projecting from thebearings of the doors to regulate the swinging movement of the same, abalance bar upon the incubator, and means whereby the sliding movementof the operating bar can be controlled by the said balance bar.

5. A cap for incubator lamps comprising a framework having upwardlyextending projections upon opposite sides thereof, doors hinged to theframework and swinging against the extensions to control the effectivesize of the opening through the framework, an operating bar slidablymounted upon one of'the extensions, means whereby the doors arecontrolled in their swinging movement through the operating bar, abalance bar for the incubator and means whereby the sliding movement ofthe operating bar is controlled by the balance bar.

6. A cap for incubator lamps comprising a frameworr having upwardlyprojecting extensions upon opposite sides thereof, a pair of doorshinged to the framework and swinging against the extensions to controlthe effective size of the opening through the framework, arms projectinginwardly from the bearings ofthe doors, an operating bar slidablymounted upon one of the extensions and provided with oppositelyprojecting arms which engage with the before mentioned inwardlyprojecting arms from the bearings of the doors to regulate the swingingmovement of the latter, and a balance bar upon the incubator whichcontrols the sliding movement of the operating bar.

7. A cap for incubator lamps, comprising a framework, a pair ofoppositely swinging doors hinged thereto, inwardly projecting armssecured to the said doors, an operating bar mounted to slide upon oneside of the adapted to engage the outwardly projecting portion of theoperating bar whereby the latter is moved as the balance bar is moved.

8. A cap for incubator lamps comprising a framework, a pair ofoppositely swinging doors which control the direct draft of the abalance bar upon the incubator which enlamp and which normally assume aclosed POT- position, stops limiting the swinging movement of the doors,arms secured directly to the pivot portions of the doors and projectingtoward each other, an operating bar slidably mounted upon one side ofthe framework, one end of the operating bar being formed with oppositelyprojecting portions which engage with the arms upon the doors, While theopposite end of the operating bar is bent outwardly, and the balance barupon the incubator adapted to operate through the outwardly bent portionof the operating bar to open or close the door.

9. A cap for incubator lamps comprising a framework having upwardlyprojecting extensions upon opposite sides thereof, the sides of eachextension converging upwardly, a pair of swinging doors pivoted to theframework and folding against the extensions to control the effectivesize of the opening through the framework, said doors being secured uponpintles, with which they are movable connection wlth the pintles andserving as an bar slidably mounted upon one of the extensions,oppositely projecting arms at the lower end of the operating bar whichengage with the before mentioned inwardly projecting arms extending fromthe pintles to control the movement of the doors, an outwardlyprojecting portion at the upper end of the operating bar, and a balancebar upon the incubator which engages with the before mentioned outwardlyprojecting portion at the upper end of the operating bar to regul latethe sliding movement of the same.

a In testimony whereof I afiix my signature in presence of twoWitnesses.

JAMES T. MOLLOY.

- lVitnesses:

F. M. KINsEY, FRANK HUMLONG.

5 operating means for the doors, an operating in sL]

